/*-
 * ============LICENSE_START=======================================================
 *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
 *  Modifications Copyright (C) 2020 Nordix Foundation.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 * ============LICENSE_END=========================================================
 */

package org.onap.policy.apex.core.infrastructure.messaging.impl.ws.server;

import java.net.InetSocketAddress;
import org.java_websocket.WebSocket;
import org.java_websocket.handshake.ClientHandshake;
import org.java_websocket.server.WebSocketServer;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;

/**
 * This class is the web socket server specific implementation for Apex.
 *
 * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
 */
abstract class WebSocketServerImpl extends WebSocketServer {
    // The logger for this class
    private static final XLogger LOGGER = XLoggerFactory.getXLogger(MessageServerImpl.class);

    /**
     * Constructor of this class.
     *
     * @param address host address of the local machine.
     */
    protected WebSocketServerImpl(final InetSocketAddress address) {
        super(address);
        LOGGER.entry(address.getAddress().getHostAddress() + ":" + address.getPort());
        LOGGER.exit();
    }

    /**
     * {@inheritDoc}.
     */
    @Override
    public void onOpen(final WebSocket conn, final ClientHandshake handshake) {
        LOGGER.entry(conn, handshake);
        LOGGER.debug("A client connection opened from machine {}.",
                conn.getRemoteSocketAddress().getAddress().getHostAddress());
        LOGGER.exit();
    }

    /**
     * {@inheritDoc}.
     */
    @Override
    public void onClose(final WebSocket conn, final int code, final String reason, final boolean remote) {
        LOGGER.entry(conn, code, remote);
        LOGGER.debug("A client  connection from machine {} closing with code {}.", super.getAddress(), code);
        LOGGER.exit();
    }

    /**
     * {@inheritDoc}.
     */
    @Override
    public void onError(final WebSocket conn, final Exception ex) {
        // some errors like port binding failed may not be assignable to a specific web socket
        LOGGER.error("server error occurred", ex);
    }
}